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Oncology
Metastatic breast cancer presenting as an incidental colon polyp on screening colonoscopy
  1. Avery Daily1,
  2. Vashnavi Singh2,
  3. Julie Cupp3 and
  4. Prakash Peddi4
  1. 1General Surgery, Willis-Knighton Health System, Shreveport, Louisiana, USA
  2. 2Internal Medicine, Willis-Knighton Health System, Shreveport, Louisiana, USA
  3. 3Breast Surgical Oncology, Willis-Knighton Health System, Shreveport, Louisiana, USA
  4. 4Hematology and Oncology, Willis-Knighton Health System, Shreveport, Louisiana, USA
  1. Correspondence to Dr Avery Daily; adaily{at}wkhs.com

Abstract

Metastatic spread of breast cancer to the gastrointestinal (GI) tract is uncommon. When it does occur, it is typically associated with invasive lobular carcinoma and most often involves the stomach and intestinal wall, though the colon may be involved in rare instances. We present a unique case of metastatic breast cancer diagnosed via a colonic polyp found during routine screening colonoscopy. This case illustrates an unusual presentation of metastatic breast cancer.

  • Cancer
  • Breast cancer
  • Endoscopy
  • Immunohistochemistry
  • Screening (oncology)

https://doi.org/10.1136/bcr-2025-265496

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    Footnotes

    • Contributors AD drafted the manuscript and obtained the images. VS created the table, assisted with synthesising the discussion portion of the report and was involved in direct care of the patient. JC and PP reviewed the final manuscript and provided a critique. PP was involved in the direct care of the patient and obtained the patient's consent. All authors contributed to the final version of the manuscript. The guarantor of this work is PP.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

    • Competing interests None declared.

    • Provenance and peer review Not commissioned; externally peer reviewed.